A compartment model for analysis of routine releases of radionuclides to a fjord

A compartment model has been used to calculate the radionuclide concentration in the local aquatic environment from routine releases of liquid radioactive effluents from the Halden Boiling Heavy Water Reactor and the subsequent radiation doses to critical groups from a number of exposure pathways have been estimated. The results will be used to define release limits for the reactor operation, implicating a conservative approach, and for each radionuclide the model input values have been varied to obtain the combination of values which gives the highest radiation dose. (au)